While theres nothing wrong with serialised cards per se, their limitation to collector boosters is yet another of Wizards of the Coasts fingers upsetting the scale balanced between game and collectible
Into the Roil [Wizard deck]: Following the previous card, this would help after cloning
Shanks (OP09-004-v6 and v4) $967.01 and $966.75 These two are the AA-rarity Shanks alt-arts from Emperors of the New World (OP09)
While it takes a few turns to get full value, if we play it on Turn 2, the last lore counter will happen on Turn 4, allowing us to play a six-drop Giant (while the first two lore counters help us dig for a payoff)
Seek the Wilds: Commune with the Gods is five cards and you choose for a creature or an enchantment then drop the rest to your graveyard
This week, we're heading to Tarkir: Dragonstorm Standard to check out the Mardu clan, which I think sneakily might be one of the strongest in the set